STEALTHMARK · HEAD TO HEAD

All comparisons ↗

Kimi K3.1 Pro vs Qwen3.5-9B

Kimi K3.1 Pro leads Qwen3.5-9B by 46.2 points on StealthMark, 56.7 to 10.5. It leads on all 9 benchmarks. Kimi K3.1 Pro scores higher on Newton's Mirror, with its largest category advantage in reflections.

See the difference ↘
All results ↗
All results ↗

Overall StealthMark

56.7/100Overall rank 11/53
10.5/100Overall rank 53/53

General Intelligence

53.9/100
7.8/100

Visual Intelligence

62.0/100
14.9/100

Reasoning efficiency

On every task, result quality and reasoning tokens are each compared with all measured models and weighed equally. Each dot is one model.

Single-step reasoning Result quality weighed against reasoning tokens on a single problem

Multi-step reasoning Result quality weighed against reasoning tokens across connected steps, as in agentic workflows

Open or local

Local modelOpen model · Apache-2.0

BENCHMARK BY BENCHMARK

Where each model leads

  • Kimi K3.1 Pro
  • Qwen3.5-9B
  • Other models
  • Median

DATASHEET

Specs and pricing

Kimi K3.1 Pro scores higher on StealthMark. Qwen3.5-9B is 40× cheaper per output token and runs 38% faster in our speed test. Both take about 1M tokens of context.

  • Kimi K3.1 Pro
  • Qwen3.5-9B
  • Other models
  • Median
PricePer 1M output tokens, input below
Kimi K3.1 Pro: $10$2 inputQwen3.5-9B: $0.2540× cheaper$0.17 input
Context windowTokens per request, max output below
Kimi K3.1 Pro: 1MTied1M max outputQwen3.5-9B: 1.01MTied
Output speedTokens per second, our measurement
Kimi K3.1 Pro: 117tokens/sQwen3.5-9B: 16138% fastertokens/s
SizeTotal and active parameters
Kimi K3.1 Pro: 2.8T104B activeEstimatedQwen3.5-9B: 9BAll activeEstimated
Developer
Moonshot AIQwen
Released
23 Oct 20262 Mar 2026
Origin
ChinaBoth
Input → output
Text, image, video → textBoth
Architecture
Post-trained version of Kimi K3, a Mixture-of-Experts modelDense causal language model with vision encoder; Gated DeltaNet + gated attention; MTP-trained

Full datasheets, every price and sourceKimi K3.1 Pro ↗Qwen3.5-9B ↗

Anticipating threats and planning ahead. Collect coins while avoiding ghosts. Ghosts move before the player each turn, and collisions cost a life. 3 levels in sequence, up to 66 turns in total. Earlier moves and outcomes carry forward, testing learning across levels.

Kimi K3.1 Pro 61.1/100Rank 10/47

Survived 1 of 3
Foresight: complete playing field
Level 315 ptsTurn 20 / 20

Qwen3.5-9B 12.8/100Rank 43/47

Survived 0 of 3
Foresight: complete playing field
Level 32 ptsTurn 8 / 20

Points per level

LevelKimi K3.1 ProQwen3.5-9B
Level 1Second Thoughts
15 ptsOut of lives
4 ptsOut of lives
Level 2Pressure Pot
12 ptsOut of lives
4 ptsOut of lives
Level 3Hide or Flight
15 ptsSurvived
2 ptsOut of lives

Cooperative planning and learning from experience. Coordinate two robots to push numbered cores onto matching sockets. Pressure plates hold doors open; moving either robot uses one turn. 5 levels in sequence, up to 152 turns in total. Earlier moves and outcomes carry forward, testing learning across levels.

Kimi K3.1 Pro 81.8/100Rank 8/48

Cleared 5 of 5
Latch: complete playing field
Level 519.8 ptsTurn 31 / 40

Qwen3.5-9B 3.8/100Rank 43/48

Cleared 1 of 5
Latch: complete playing field
Level 54.4 ptsTurn 33 / 40

Points per level

LevelKimi K3.1 ProQwen3.5-9B
Level 1Hold the door
5.2 ptsCleared
5 ptsCleared
Level 2Crossfeed
9.8 ptsCleared
3.8 ptsFinished early
Level 3Relay vault
19.2 ptsCleared
1.2 ptsFinished early
Level 4Passing bay
18.2 ptsClearedFinished early · 3 beacons left
0.2 ptsFinished early
Level 5Second thoughts
19.8 ptsCleared
4.4 ptsFinished early

Newton's Mirror

Same task instructions

Physics, perspective and recursive reflections, tested together. Explore the test ↗

The judgment

Kimi K3.1 Pro

The settled sphere, separate airborne black paint and crimson-before-cyan interaction are supported, with a modest crimson travel overshoot. A shared downward framing displacement remains after accounting for the square canvas. The principal limitation is the reflection system: sparse sphere copies and generic curved bands omit most of the ordered mirror-room structure. Materials receive a small upward revision because bounded bright images and dark bands visibly establish some polish, while soft shading and bulky paint remain separate weaknesses.

Qwen3.5-9B

Horizontal centering and a separate airborne black blob are visible. Cyan's recent contact and crimson's forward transport are insufficiently demonstrated, while sphere support remains obscured. The enlarged, lowered sphere substantially changes the composition. The wall and floor sphere images, recursive room structure and curved emitter mappings are almost entirely missing.

Score breakdown

CategoryKimi K3.1 ProQwen3.5-9B
State at 600 ms23.5/253.0/25
Camera and placement10.5/154.5/15
Reflections26.0/1202.0/120
Materials and scale7.0/103.0/10
Floor-damage reward0.0/100.0/10

Benchmark task

A spinning metal sphere and paint in a mirrored room test physical reasoning, perspective and consistency across repeated reflections.

Selfie

Different task instructions

Visual construction and creative interpretation.

The judgment

Kimi K3.1 Pro

The transformed reflection, attentive pose and constellation anatomy clearly communicate introspection. Purposeful fine details enrich a coherent composition. Tubular limbs, crowded lower-body overlaps, shallow depth and limited cast lighting keep the overall execution within the competent range.

Qwen3.5-9B

Glowing teal spheres and a harmonious palette provide visible strengths, but the central character remains seriously unresolved. A large gap separates head and torso, limbs cannot be traced, and scattered garment shapes fail to establish the ornate costume. The foreground mound replaces the tall enclosing arch. Clean primitive edges do not repair these construction failures.

Score breakdown

CategoryKimi K3.1 ProQwen3.5-9B
Task & likeness8.0/103.0/10
Anatomy & construction5.5/102.0/10
Space & placement6.5/103.0/10
Light & reflections6.5/103.5/10
Purposeful detail7.5/102.0/10
Artistry & character7.0/102.0/10
Materials & effects7.0/104.0/10
Visual integrity7.0/103.0/10

Benchmark task

Kimi K3.1 Pro

An imagined creature encounters its reflection. The scene tests original character design, visual self-interpretation and the relationship between a subject and its reflected image.

Qwen3.5-9B

A floating capybara in ornate robes tests character anatomy, layered fabric and the placement of surrounding luminous forms.

Mona Lisa

Different task instructions

Precise visual recall and portrait reconstruction.

The judgment

Kimi K3.1 Pro

A coherent, recognizable interpretation with controlled color and readable landscape layers. Replication is limited by the frontal seated construction, elongated facial proportions and oversized, weakly articulated hands. Smooth shading supplies some volume but little of the reference's subtle expression, fabric structure or atmospheric transitions.

Qwen3.5-9B

A centered dark oval with sparse facial marks forms a simple graphic face, but scarcely replicates the Mona Lisa. The portrait's body, crossed hands, clothing and landscape are missing, while angular facial construction and flat tones lose its likeness, volume and subtle expression.

Score breakdown

CategoryKimi K3.1 ProQwen3.5-9B
Task & likeness5.0/100.0/10
Anatomy & construction5.0/100.0/10
Space & placement5.5/100.0/10
Light & reflections6.0/100.0/10
Purposeful detail5.5/100.0/10
Artistry & character6.0/100.5/10
Materials & effects5.0/100.0/10
Visual integrity6.5/100.5/10

Benchmark task

An SVG interpretation of the Mona Lisa tests facial likeness, anatomy and the composition of a familiar portrait.

Beach

Same task instructions

Creativity, perspective and visual beauty.

The judgment

Kimi K3.1 Pro

A coherent, playful beach illustration with readable animals, an organized composition and an aligned sunset reflection. Connected silhouettes, sand texture and atmospheric effects demonstrate controlled execution. Simplified joints, flattened foreground viewpoints and inconsistent shadows limit anatomical and spatial credibility.

Qwen3.5-9B

The beach is recognizable, and sweeping shoreline curves provide basic rhythm. Wildlife and playful activity remain poorly resolved, with ambiguous body construction and object contact. The sun glows without corresponding reflections or surface lighting. Fragmented subjects and an unintegrated rectangular panel substantially weaken composition and finish.

Score breakdown

CategoryKimi K3.1 ProQwen3.5-9B
Task & likeness8.5/101.5/10
Anatomy & construction5.5/100.5/10
Space & placement5.5/101.5/10
Light & reflections6.5/101.0/10
Purposeful detail6.5/102.5/10
Artistry & character5.5/101.5/10
Materials & effects6.5/100.5/10
Visual integrity7.5/101.5/10

Benchmark task

A busy shoreline at sunset tests scene composition, animal forms and the relationship between light and water reflections.

Ground Truth

Same task instructions

Physical reasoning, light and visual reconstruction.

The judgment

Kimi K3.1 Pro

This benchmark has not been assessed yet.

Qwen3.5-9B

This benchmark has not been assessed yet.

Benchmark task

A plank, computer mouse and blueberry in a steel room test physical stability, spatial relationships, materials and lighting.

Raccoon

Same task instructions

Scene composition and interacting subjects.

The judgment

Kimi K3.1 Pro

The additional comparisons support retaining the assessment. Readable steering, shaped animal contours and purposeful details coexist with simplified joints, a frontal passenger whose seated weight is weakly conveyed, and limited physical lighting. The angled craft establishes more depth than the riding pose resolves.

Qwen3.5-9B

Bright colors, clean individual shapes and basic animal cues make the scene partly recognizable. Back seating, body continuity, steering and jet ski construction remain unresolved. Background gradients and wave rhythm provide some finish, but substantial anatomical, spatial and interaction weaknesses dominate.

Score breakdown

CategoryKimi K3.1 ProQwen3.5-9B
Task & likeness7.0/102.5/10
Anatomy & construction5.5/101.0/10
Space & placement6.0/102.0/10
Light & reflections5.5/101.0/10
Purposeful detail7.0/101.5/10
Artistry & character6.0/101.0/10
Materials & effects6.0/101.0/10
Visual integrity7.0/102.5/10

Benchmark task

A jet-ski scene pairs a canine driver with a raccoon passenger. It tests the placement and contact of interacting subjects, along with vehicle construction.

Pelican

Same task instructions

Subject construction and spatial relationships.

The judgment

Kimi K3.1 Pro

A characterful coastal illustration with controlled contours and varied feather, accessory and bicycle detail. Layered scenery and subtle shading enrich the presentation. Soft leg articulation, unresolved riding contacts, shallow depth and generalized lighting limit physical precision.

Qwen3.5-9B

The oversized bill and orderly spoked wheels make the subject partly recognizable. Clean contours and strong color contrast provide graphic clarity, but unresolved appendages, steering, drivetrain and support dominate the construction. Sparse shading and detail further limit the illustration.

Score breakdown

CategoryKimi K3.1 ProQwen3.5-9B
Task & likeness8.5/104.0/10
Anatomy & construction7.5/101.5/10
Space & placement6.5/103.0/10
Light & reflections6.5/101.5/10
Purposeful detail7.5/102.5/10
Artistry & character7.5/101.5/10
Materials & effects6.5/101.5/10
Visual integrity7.5/102.5/10

Benchmark task

A cycling pelican tests anatomy, riding posture and contact between the bird and the bicycle.